package com.xzz.cloud.consumer.order.controller;

import com.xzz.cloud.consumer.order.lb.LoadBalance;
import com.xzz.cloud.entity.CommonResult;
import com.xzz.cloud.entity.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @author: hhz
 * @createDate: 2021-4-1
 */
@RestController
@Slf4j
public class OrderController {
    @Resource
    private RestTemplate restTemplate;
    @Resource
    private LoadBalance loadBalance;
    @Resource
    private DiscoveryClient discoveryClient;

//    public static final String PAYMENT_URL = "http://localhost:8001";
    public static final String PAYMENT_URL="http://CLOUD-PAYMENT-SERVICE";


    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        log.info("---order 调用 payment create方法");
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create", payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id")Long id){
        log.info("----order 调用 payment get方法");
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id, CommonResult.class);
    }
    @GetMapping(value = "/consumer/payment/lb")
    public CommonResult<Payment> getPaymentLB(){
        //通过服务集群名称获取有效的服务器实例集合
        List<ServiceInstance> instances=discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        //判断服务器是否为空
        if(instances==null || instances.size()==0){
            return null;
        }
        //获得自己写得轮循算法得到的将要提供服务的服务器实例
        ServiceInstance serviceInstance= loadBalance.instance(instances);
        URI uri=serviceInstance.getUri();
        return restTemplate.getForObject(uri+"/payment/get/1" ,CommonResult.class );
    }
}
